Stop-motion for planers and the like.



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C. H. USHBR. STOP MOTION FOR PLANERS AND THE LIKE.

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G.- H. USHER.

sToP MOTION Fo PLANERS AND THB LIKE.

APPLICATION FILEDv TERZO, 1911.

Patented May 28, 1912.v s SHEETS-SHEET 2.

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"AT1 RNEYS f O. H. USHER.

STOP MOTION FOR PLANBRS AND THE LIKE.

APPLICATION I'ILEI) FBB.20, 1911.

1 ,027,575. Patented May 28 1912.

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ATT RNEYS UNITED STATES rATENT oEEioE.

CHARLES H. USHER, OF CHICOPE FALLS, MASSACHUSETTS, ASSIGNOR 0F ONE-HALFTO FRANK D. HOWARD, 0F CHICOPEE FALLS, MASSACHUSETTS.

Specification of Letters Patent.

Application led February 20, 1911. Serial No. 609,734.

To all whom t may concern:

Be it known that I, CHARLES H. USHER, a citizen of the United States ofAmerica, and a resident of Chicopee Falls, county of Hampden, and Stateof Massachusetts, have invented certain new and useful 'Improvements inStop-Motions for Planers and the Like, of which the following is aspecification, reference being had to the accompanying drawings,formingl a part thereof. j l

My invention relates to stop motions Vfor planers and kindred machinetools, and consists in a novel means forstopping further feedingmovements of the cutting tool after feeding movements to aApredetermined eX- tent have been imparted thereto.

The main objects of my'invention are to simplify and perfect mechanismof this description, to provide a single mechanism which may be appliedindifferently to the vertical or cross feed means, to provide for theready adjustment of the stop mot-ion means for operation at anypredetermined point, and to' so construct, connect, and arrange theparts that once the stop motion means has been adjusted, movements ofthe machine tool parts thereafter in a readjustment of the tool, orother movements not brought about by the ordinary operation of the feedmechanism, will not' change or affect the relative adjustment of thesto-p motion means.

In order that my invention may be fully understood, I will now describean embodiment thereof, having reference to the accompanying drawingsillustrating the same, and will then point out the novel features inclaims.

In the drawings: Figure 1 is an end view of a stop motion constructed inaccordance with my invention, showing a portion of a planer to which itis-attached. Fig. 2 is a view in rear elevation thereof.` Fig.A 3 is aview thereof in horizontal'section upon the plane of the line 3*-3ofFig. 1. Fig. 4 is a view thereof in horizontal section upon the plane ofthe line 4--4 of Fig. 1. Fig. 5 is a top view of certain parts of themechanism. Fig. 6 is -a view in vertical transverse section upon theplane of the line 6 6 of Fig. 4.

Reference character 10 designates a portion of the planer frame,beingapart of one of the vertical standards-thereof, 11 the other, the.lower shaft 13 effecting the transverse feeding movements and beingtermed herein the cross feed shaft, and the upper shaft 14 eifecting thevertical feeding movements and. being termed herein the vertical feedshaft. The intermediate ymechanism Patenten May 28,1912. I

between the said shafts and the parts moved thereby is not shown indetail herein as being well known, and constituting no part per se of mypresent invention.

The means by which the cross and vertical feed shafts are drivencomprises a vertically reciprocating rack bar 15, a pinion 16 inconstant mesh therewith, the said pinion being secured to a shorthorizontal shaft 17, at one end thereof, a gear Ywheel 18 secured to thesaid shaft at the other end thereof, a gear wheel 19 in constant meshtherewith, and loosely mounted upon the shaft 13, a sleeve 20 alsoloosely mounted upon the shaft 13, a pinion 21 mounted upon the saidsleeve and secured fast thereon, a pinion 22 secured fast upon the shaft14 and in constant mesh with the pinion 21, and ratchet and pawlmechanism including ratchet wheels 23-24 mounted fast upon the shaft 13and the sleeve 20 respectively and pawls 25, 25, for respect-iveengagement therewith, the said pawls being carried by an arm 26 securedto the hub 27of the gear wheel 19.

In the operation of the planer the rack bar 15 is given a constantmovement of reciprocation, the effect of which isv to oscillate the gearwheel 19 andthe pawl carrying arm'26. By yadjusting the'pawls 25, oreither of them, into engagement with their respective ratchet wheels,and in either direction with respect thereto, intermittent step by stepfeeding movements are imparted to the cross feed shaft 13 or thevertical feed shaft 14 or both of them, all as will be well understoodby those skilled in this art.

The mechanism so far described is common in the planer art, beingcontained either in the precise form shown, or in mere mechanicalvariations thereof in standard forms of planers, substantially theprecise mechanism illustrated and described being found in the wellknown IVhitcomb7 planer.

The stop motion mechanism is as follows: Mounted fast upon the crossfeed shaft 13 and the sleeve 20 respectively, are two pinions 28-29,either one of which, as will presently appear, is adapted forintermeshing engagement with a spur gear 30. In the drawings (see Fig.4) the pinion 28 is shown in such intermeshing relation therewith. Thespur gear 30 is mounted fast upon a shaft 31 (see Fig. 6), the saidshaft being rotatably mounted in a bearing in a bracket 32, secured tothe rear face of the cross-rail 11. Mounted upon the opposite end of theshaft 31 in splined relation therewith, is a worm 33, the teeth of whichare disposed in mesh with the teeth of a worin wheel 34. The worm wheel34 is mounted fast upon a short horizontal shaft 35 to the opposite endof which is secured a pinion 36. The shaft 35 is rotatably mounted in abracket 37, which bracket also carries a hori- Zontal fixed bearing stud38 whose axis is at right angles to the axis of the shaft 35; A crowntoothed gear wheel 39 is freely mounted upon the said stud 38, the teeththereof being arranged to intermesh with the teeth of the pinion 36.Pivotally mounted upon an arm of the bracket 37 is a bell crank lever,one arm 40 of which is in pivotal engagement with a vertical latch 41and the other arm 42 of which has its extremity arranged for engagementwith a cam projection 43 which extends radially from the periphery ofthe gear wheel 39. The lower end of the vertical latch 41 extends intothe bearing for the shaft 17, and is arranged to be normally receivedwithin an annular groove 44 in the said shaft. The length of thatportion of the shaft 17 between the pinion 16 and the gear wheel 18 isgreater than the length of the bearing for the Shaft, whereby the shaftmay have a longitudinal movement in the said bearing as well as itsnormal rotational movement.

The extent of this movement is such as to permit the pinion 16 to bemoved out of mesh with the rack bar 15 when desired. A spring pressedpin 45 (see Fig. 3) normally bears against the side face of the gearwheel 18 to force the shaft 17 in a direct-ion to disengage its pinion16 from the rack 15, but the vertical latch 41 in its engagement withthe groove 44 normally holds the parts against such movement. A spring46 acts, with the force of gravity, to hold the latch in its normaloperative position.

While the teeth of the crown toothed gear wheel 39 are normally in meshwith the teeth of the pinion 36, the gear wheel 39 may be movedlongitudinally along its `supporting stud 38, against the resistance ofa spring 47, to temporarily relieve it from such engagement, a knob 48being provided as a convenient means by which it may be manipulated. .Bythis means the wheel may be adjusted angularly about its axis, either inone direction or the other, to initially adjust the position of t-he camprojection 43 with respect to the arm 42 of the bell crank lever. Thespur gear 30 is likewise provided with an operating knob 49, by which itmay be grasped and adjusted with its shaft, longitudinally of the axisthereof, from the position in which it is in intermeshing relation withthe pinion 28, and in which position it is shown in the drawings, to aposition in which it is in intermeshng relation with the pinion 29. Thesplined connection between its shaft 31 and the worm 33, above referredto, permits this longitudinal movement, and a spring pressed stud 50(see Fig. 6) holds the shaft in whichever of the two positions it isadjusted at the time. By Ithis means the stop motion is immediatelyadapted for coaction with either the vertical or the cross feedmechanism, as will be well understood.

In use the spur gear iS first adjusted for engagement with either thepinion 28 or the pinion 29, in accordance with the feed with which it isto be employed, z'. c. cross or vertical feed. The wheel 39 is angularlyadjusted about its axis, so that the angular distance of the camprojection 43 from the arm 42 of the bell crank lever will beproportional to t-he amount of feed required before the machine is to bestopped. Then, care being taken that the shaft 17 is the proper positionfor the intermeshing of the pinion 16 with the teeth of the rack bar 15,and is being properly held in such position by the latch 41, the machineis started into operation. In the normal operat-ion of the planer thefeeding movements transmitted through the reciprocating rack bar and itscorrelated parts, cause the tool to move gradually through a givenplane, and during such times relative movements of rotation will beimparted to the wheel 39, until just as the tool reaches a predeterminedpoint in its feed, the cam projection 43 upon the wheel 39 will engagethe arm 42 of the bell crank lever, and in rocking the bell crank leverabout its axis, against the action of the spring 46, will lift the latch41 from its engagement with the groove 44 in the shaft 17. The shaft 17with its gear wheel 18 and pinion 16 will be immediately movedlongitudinally under the action of the spring pressed pin 4:5, and thepinion 16 will be released from its engagementy with the rack bar 15.This will disconnect vthe feeding train, and further operation of theplaner will be ineffective with respect to feeding movements of the toolcarrier.

It will be noted that because the wheel 39 is connected in direct gearedrelation with one or the other of the -feed shafts 13 or 14T, inaccordance with which is being used at the time, any return movement ofthe shafts to readjust for starting a new series of cuts, or for anyother'purpose, will cause a corresponding reverse movement of the wheel39, so that its proper relationship of position will always bemaintained, and the stop motion will always be ready to start intooperation at t-he proper point with relation to theposition of the tool,when the machine is again started up. Once the wheel 39 has beenprimarily adjusted it matters not how much the machine is operated, theoriginal adjustment is retained. After the stop motion has operated, themachine is readjusted for a new series of cuts, and the shaft 17 withits gears 16 and 18 is pushed back longitudinally to its original`position to cause the pinion 16 to again intermesh with t-he teeth ofthe rack bar 15. The precise moment at which this latter movement iseffected is immaterial, as it does not affect the relative positionofthe stop motion mechanism in any way. Nor does it matter how far backthe tool is moved to begin its new cut as the stop mechanism will arrestthe automatically driven movement of the tool at the same pointregardless of the points at which such movements begin.

It will of course be understood thatin applying my stop motion todifferent forms of planers, modifications in the structure thereof willbe necessary in conformity with the modifications in the structure ofthe feeding means, and in any event it will be understood that theprecise form and construction shown is but one of many possibleembodiments of my invention.

What I claim is:

1. The combination with tool feed mechanism, of a stop motion includinga rotatably mounted cam, means connecting the same in rotative relationwith the tool-feed mechanism, means for manually adjust-ing the said cam-with relation to -the tool feed mechanism, and means operated by thesaid cam at a predetermined point in its movement of rotation forstopping further tool feeding movements.

2. The combination with transverse tool feeding means, vertical toolfeeding means, and common operating means therefor, of a stop motionincluding a rotatably mounted cam, means for connecting the same inrotative relation with t-he said transverse tool feeding means or withthe said vertical tool feeding means, means for manually adjusting thesaid cam with relation to the tool feeding means with which it isconnected, and means operated by the said 'cam at a predetermined pointin its movement of ro-` tation for stopping further tool feedingmovements.

3. The combination with transverse tool feeding means, vertical toolfeeding means, and common operating means therefor, of a stop motionincluding a rotatably mounted cam, means for connecting the same inrotaj tive relation with the said transverse tool feeding means or withthe said vertical tool feeding means, means for manually adjusting thesaid cam with relation to the tool feeding means with which it isconnected, and means operated by the said cam at a predetermined pointin its movement of rotation for disconnecting the tool feed mechanismfrom its said operating means.

4. The combination with vertical and transverse tool feeding mechanism,of a stop motion comprising a reciprocatory rack and a pinion adapted tobe moved axially into 0r out of engagement with Asaid rack, and meansautomatically actuated at a predetermined point in the operation of saidtool feeding mechanism for arresting further movements thereof, andmeans for connecting the said stop motion with either the vertical orthe transverse tool feeding, mecha- 5. The combination with commonoperat-v ing means for transverse tool feeding mechanism and verticaltool feeding mechanism, of a stop motion for the feeding mechanismcomprising a reciprocatory rack and a pinion adapted to be moved axiallyinto or out of engagement with said rack, and means for connecting thesaid stop motion with said transverse or vertical tool feedingmechanisms, the said stop motion comprisingv means automaticallyactuated at a predetermined point in the operation of the tool feedingmechanism for arresting further movements thereof.

6. The combination with tool feeding mechanism comprising areciprocatory rack and a pinion in engagement therewith adapted to beaxially disengaged therefrom, of a stop motion including meansautomatically actuated at a 'predetermined point in the operation of thetool feed mechanism for withdrawing the pinion upon engagement with saidrack.

7. The combination with tool feeding mechanism comprising areciprocatory rack and a pinion adapted to engage said rack, of a stopmotion comprising a rotatable cam and means operated thereby at apredetermined point in its movement ofjrotation for arresting furthermovements of said tool feeding mechanism.

8. The combination with tool feeding mechanism comprising areciproeatory rack and a pinion adapted to be moved axially,

into or out oi' engagement with said rack, of a Stop motion comprising arotatable Cam and means operated thereby at a predetermined point in itsmovement of rotation for disengaging the pinion from the rack.

9. The combination with tool feed mechanism Comprising a. reeiprooatoryrack and a.

`pinion adapted to be movedfaxially into or out of engagement With saidrack, of a stop motion comprising a rotatable cam, and means operatedthereby at a predetermined point in its movement of rotation fordisengaging the pinion from the rack.

CHARLES H. USHER. Titnesses T. D. HOWARD, M. R. VERETTE.

Copies of this patent may beobtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

